Sub page content not being displayed

Hi,

I am making a site using static pages rather than posts (using WordPress as a CMS.)

I have main pages (with excerpts of an anthology) on them, and sub pages that are each a child of a main page (the children work as biography pages of the author of the excerpt.)

The content of the main pages is displaying fine, but the content of the sub pages isn’t showing (these were both using page.php, I also tried using a separate biog.php as the page template for sub pages with identical html/php as page.php and that didn’t display either.)

Any ideas?!

The site is https://www.splashanthology.com